Certain Memory Fails to Be Found

Publication Date: 2012-07-21Views: 257Downloads: 0

Issue Description

The memory is checked during BIOS booting. The memory size displayed on the screen is smaller than the actual memory size.
• The memory size checked during system booting is smaller than the actual memory size.
• The memory size found in the operating system is smaller than the actual memory size.

Alarm Information

None

Handling Process

1. Check whether the current system is a 32-bit operating system.
2. Check whether all memory banks are inserted into correct slots. Table 1 lists the correct slot positions of memory banks.

Table 1 Requirement for installing memory banks

Number of Memory Banks

DIMM_A2

DIMM_A1

DIMM_B2

DIMM_B1

DIMM_C2

DIMM_C1

DIMM_D2

DIMM_D1

1

-

Y

-

-

-

-

-

-

2

-

Y

-

Y

-

-

-

-

4

-

Y

-

Y

-

Y

-

Y

8

Y

Y

Y

Y

Y

Y

Y

Y

CAUTION:

The IDs of the eight DIMM memory slots of the V1300N are A2, A1, B2, B1, C2, C1, D2, and D1 from left to right, as shown in Figure 1. One, two, four, or eight memory banks can be configured. The installation for each configuration must meet the requirement listed in Table 1.

Figure 1 Sequence of memory banks

3. Remove memory banks and check whether slots are damaged.
4. Insert the memory banks again and ensure that all memory banks are properly inserted. If certain memory is still not found after power-on, you need to change the memory banks.

Root Cause

• Faulty memory banks or damaged memory slots exist.
• Certain memory banks are installed in incorrect slots.
• If the current system is a 32-bit operating system, you can find up to 4 GB memory.